Giz is one half of the small group known as the Sirga Twins of Shogun, being the twin brother of Biz. Because he is three seconds older than his twin, Giz always tries to establish dominance which is a struggle when dealing with his equally hyper-active and egotistical brother. His motivation for becoming a pirate is to earn enough credits to purchase food and supplies for his people on Predin, though he does tend to forget this and spend thousands of credits on either food or explosive weaponry.
Giz is bipolar and has mood swings frequently, though ranging only from ecstatic to angry. This hyper-active creature, though considered a young adult by Sirga standards, is treated as a young child by many of the Shogun members based off of the fact that he tends to show characteristics that mirror that of a young human child. Unlike his brother, when faced with a dangerous task he blindly rushes into it with only adrenaline backing him.